Record problems encountered during Android beginners

1. Click the event button to respond to the form,

(1) register the listener in OnCreate of the form.

Button btnAddBook = (Button) findViewById (R. id. btnAddBook );

BtnAddBook. setOnClickListener (this );

(2) The form class is required to implement the OnClickListener interface.

Public class ReadProgressActivity extends ActivityImplements OnClickListener

And implement

Public void onClick (View v ){

Intent intent = null;

Switch (v. getId ()){

Case R. id. btnAddBook:

Intent = new Intent (this, AddBookActivity. class );

StartActivity (intent );

Break;

}

}

2. Android activity not found exception.

Because the form is not declared in AndroidManifest. xml.

3. Exit the form: this. finish ();